Comparison

RF vs Ham2K Portable Logger

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

RF

This app provides over 90 specialized tools for high-frequency electronics, catering to RF professionals, radio amateurs, and students. It offers calculations for PCB traces, filters, impedance, and more, with ongoing updates and new features planned.

Highlights
  • PCB Trace Width and Impedance
  • LC/L/T/Pi Match Calculation
  • Coax Cable Calculations
  • Amplifier and Attenuator Cascade
  • SWR/Reflection/Return Loss Conversion
  • Filter Design (Butterworth, Chebyshev)
  • RF Units Conversion
Read full description

Specialized on high frequency electronics for RF professionals, radio amateurs and students. RF-Toolbox is based on the popular Electronic Toolbox by Marcus Roskosch. This app contains some of the common tools of Electronic Toolbox but contains a wide range of additional tools, specialized for high frequency electronics, RF professionals, radio amateurs and students. Currently RF-Toolbox consists of more than 90 tools and like Electronic Toolbox, there are more to come over the time. Feature list: ■ PCB Trace Width (Internal and external Traces) ■ PCB Trace Resistance ■ PCB Trace Impedance (various trace types e.g. Microstrip, embedded Microstrip, Symmetric and Asymetric Stripline, Wire Microchip, Wire Stripline, Edge Coupled Microstrip and Stripline) PCB Crosstalk (Microstrip and Stripline) ■ LC L/T/Pi Match calculation ■ Coax Cable calculation (Standard and individual Types) ■ Amplifier and Attenuator cascade calculation ■ SWR / Reflection / Return loss conversion ■ Power Divider (Branchline, Ratrace and Wilkinson) ■ Capacitor Plate calculation ■ RLC Parallel, Series and Circuit calculation ■ Noise Figure conversion ■ Skin Depth calculation (various materials from Aluminum to Silver) ■ Butterworth Filter (also with plot of filter chart) ■ Chebyshev Filter (also with plot of filter chart) ■ R-C, L-C, R-L High/Low/Band-Pass Filter ■ RF Units conversion (quick conversion of frequently used units) ■ Air coil inductance calculation ■ Resistors, Capacitors, Inductors in Parallel / Series And there is much more... ■ Aktive Filter calculation tool ■ Antenna calculation tool ■ Delta Star calculation ■ Cable length / ampacity tool ■ PTC / NTC Temperature Resistance conversion ■ AC Ohms law tool ■ Zener diode circuit calculation ■ Constant current source tool ■ ASCII Table ■ Desktop calculator ■ Resistor/Capacitor/Inductor combinations tool ■ 4-20mA conversion tool ■ Passive cooling calculator ■ Audio Oscilloscope Please check out more screen shots on my website (WEBSITE Link on the left side). If you have questions, please feel free to contact me by using the Support button here, inside the App or on my website. Thank you! Marcus Roskosch

About

Ham2K Portable Logger

Log your amateur radio contacts (QSOs) efficiently while on the go. Supports popular operating events like POTA, SOTA, and Field Day, offering features like QRZ lookups, QSO maps, and offline data. Quickly find nearby parks and receive duplicate warnings.

Highlights
  • Log QSOs on the go
  • Support for POTA, SOTA, Field Day
  • QRZ.com name lookups
  • QSO Maps
  • Offline data files
  • Duplicate QSO warnings
  • Search nearby parks
Features
Read full description

The best app to log your QSOs on the go. Support for Parks On The Air (POTA), Summits On The Air (SOTA), Field Day, Winter Field Day, Worldwide Flora and Fauna (WWFF) and more. Fast and efficient yet fully-featured: QRZ.com name lookups, QSO Maps, offline data files, contact rates, duplicate warnings, POTA spots, search parks nearby or by name, etc. See https://www.ham2k.com/legal/terms-of-service/

Screenshots

RF4 screens
Ham2K Portable Logger4 screens

Verdict

The call

The clearest difference is price: Ham2K Portable Logger at Free against RF's $7.99. Ham2K Portable Logger also leads on update cadence (monthly vs every 4 months). RF's advantage is in-app purchases (none vs 8) and ads (none vs shown). On review sentiment, ratings volume and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Ham2K Portable Logger is free to download; RF costs $7.99 up front. Ham2K Portable Logger sells 6 in-app purchases, starting at $2.99 per month. RF asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

RF holds the better App Store score, 4.9 against 4.7. Both are backed by a comparable volume of ratings — 22 and 49 respectively. Written reviews point the same way: 91% of RF's written reviews are positive against 86% of Ham2K Portable Logger's.

UpkeepUpdate frequency

RF ships an update every 4 months, Ham2K Portable Logger monthly. The most recent releases landed on October 11, 2026 and October 7, 2026 respectively.

Scorecard7 real differences · 3 level
RF versus Ham2K Portable Logger: the parameters behind the verdict, then further details
ParameterRFHam2K Portable Logger
Price$7.99Free — better
Rating4.9 (22 ratings) — better4.7 (49 ratings)
Positive reviews91.1% of reviews — better86.5% of reviews
Number of ratings2249 — better
Update frequencyEvery 4 monthsMonthly — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.1 — better15.1
Further details — not scored
Size92 MB118 MB
Age rating4+4+
DeveloperMarcus RoskoschSebastian Delmont

Customer experience

RF

All ratings22 ratings
Positive95.5%
Neutral0.0%
Negative4.5%
Written reviews45 reviews
Positive91.1%
Neutral4.4%
Negative4.4%

Ham2K Portable Logger

All ratings41 ratings
Positive92.7%
Neutral2.4%
Negative4.9%
Written reviews37 reviews
Positive86.5%
Neutral5.4%
Negative8.1%

In-app purchases

None

RF

No in-app purchases

6 purchases

Ham2K Portable Logger

Subscriptions2
  • Ham2K Log Filer - Monthly$2.991 Month
  • Ham2K Log Filer - Annual$24.991 Year
One-time4
  • Show a bit of support…2 variants$4.99
  • Show your support!$12.99
  • Show your support!$14.99
Show 1 more
  • Show a lot of support!!!2 variants$29.99

Questions

Is RF free?
RF costs $7.99, with no in-app purchases.
Is Ham2K Portable Logger free?
Ham2K Portable Logger is free to download, with in-app purchases available.
Which has better reviews, RF or Ham2K Portable Logger?
RF is rated higher. RF averages 4.9 out of 5 from 22 ratings, while Ham2K Portable Logger averages 4.7 from 49 ratings.
Do RF or Ham2K Portable Logger have ads?
Ham2K Portable Logger shows ads; RF does not.
Which is updated more often, RF or Ham2K Portable Logger?
RF ships an update every 4 months, and Ham2K Portable Logger monthly. Most recently, RF was updated on October 11, 2026 and Ham2K Portable Logger on October 7, 2026.

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